Make the Green Sauce: In a bowl, stir together the salsa verde and cream of chicken soup until smooth and creamy.
Prep the Baking Dish: Heat oven to 375°F. Lightly grease a 9x13-inch baking dish, then spread a thin layer of the green sauce across the bottom.
Mix the Buffalo Chicken Filling: In another bowl, stir together the buffalo-style chicken dip and shredded rotisserie chicken until the chicken is evenly coated and creamy.
Fill and Roll: Spoon filling down the center of each tortilla, about ¼ cup per tortilla, then roll up and place seam-side down in the baking dish.
Sauce and Cheese It: Spoon the remaining green sauce over the enchiladas and spread it out evenly, then sprinkle Monterey Jack over the top.
Bake Covered: Cover the dish tightly with aluminum foil and bake for about 20 minutes, until hot and bubbly at the edges.
Finish Uncovered: Remove the foil and bake 5 more minutes, until the cheese is fully melted and looks ready to ruin your shirt.
Make the Avocado Mango Dip: While the enchiladas bake, gently mix the diced mango and diced avocado in a bowl until combined, keeping it chunky instead of mashed.
Garnish and Serve: Sprinkle sliced olives over the enchiladas, then serve hot with the avocado mango dip and tortilla chips on the side.